<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        #dad{
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            flex-direction: row;
            background-color: rgb(56,56,56);
            margin: auto;
            width:400px;
            height:300px;
            border-radius:10px;
            flex-wrap: wrap;

        }
        #son1{
            width:120px;
            /*align-self: stretch;*/
            background-color: rgb(51,125,164);
            color:white;
            line-height: 120px;
            text-align: center;
            border-radius:8px;
            flex-basis: 120px;
            flex-grow: 1;
        }
        #son2{
            width:80px;
            background-color: rgb(83,177,56);
            color:white;
            line-height: 80px;
            text-align: center;
            border-radius:8px;
            flex-basis: 80px;
            flex-grow: 1;
        }
        .son3{
            width:100px;
            /*height:100px;*/
            background-color: rgb(204,125,47);
            color:white;
            line-height: 80px;
            text-align: center;
            border-radius:8px;
            flex-basis: 100px;
            flex-grow: 1;
        }
    </style>
</head>
<body>
    <div id="dad">
        <div id="son1">
            <#son-1>
        </div>
        <div id="son2">
            <#son-2>
        </div>
        <div class="son3">
            <#son-3>
        </div>
    </div>
</body>
</html>